package com.wct.util;

public class GPSUtil
{
    
    private static double EARTH_RADIUS = 6378.137;
    
    private static double rad(double d)
    {
        return d * Math.PI / 180.0;
    }
    
    private static double GetDistance(double lat1, double lng1, double lat2, double lng2)
    {
        double radLat1 = rad(lat1);
        double radLat2 = rad(lat2);
        double a = radLat1 - radLat2;
        double b = rad(lng1) - rad(lng2);
        double s =
            2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2) + Math.cos(radLat1) * Math.cos(radLat2)
                * Math.pow(Math.sin(b / 2), 2)));
        s = s * EARTH_RADIUS;
        // s = Math.round(s * 10000) / 10000;
        return s;
    }
    
    public static long getDistance(double lat1, double lng1, double lat2, double lng2)
    {
        double temp = GetDistance(lat1, lng1, lat2, lng2);
        return Math.round(temp * 1000);
    }
    
    public static double convertToDouble(short degree, short cent, float secord)
    {
        return degree + cent / (60 * 1d) + secord / (3600 * 1d);
    }
    
    public static short[] convertback(Double a)
    {
        short[] array = new short[3];
        Double degree = Math.floor(a);
        array[0] = degree.shortValue();
        a = a - degree;
        a = a * 60;
        Double cent = Math.floor(a);
        array[1] = cent.shortValue();
        a = a - cent;
        a = a * 60;
        Long second = Math.round(a);
        array[2] = second.shortValue();
        return array;
    }
    
}
